RU216786U1 - Catalytic Cracking Unit Regenerator - Google Patents

Abstract

The proposed utility model relates to chemical engineering and can be used in reactor-regenerator units of installations, mainly for catalytic cracking.

Catalytic cracking unit regenerator, including a body with a drain funnel, a hot air inlet device and a coked catalyst inlet unit, which is a branch pipe cut into the bottom of the body, equipped with a fairing in the form of a vertical partition and a baffle.

The design features of the proposed device is that a cylindrical chamber is attached to the bottom of the bumper, equipped with rectangular windows distributed over the side surface with the same angular pitch, and parallel plates are attached to the vertical edges of the windows from the outer sides, between which, in the upper part, perpendicular to them side surfaces, placed flat partitions connected to each other.

The proposed design of the regenerator of the catalytic cracking unit makes it possible to effectively regenerate the catalyst by providing a uniform distribution of coked catalyst particles and preventing the formation of stagnant zones.

Description

The proposed utility model relates to chemical engineering and can be used in reactor-regenerator units of installations, mainly for catalytic cracking.

Known regenerator catalytic cracking [UK Patent N 1562571, class. In 01 J 8/26, 1980]. This regenerator comprises a housing with a coaxially mounted drain funnel and a coked catalyst inlet in the form of a branch pipe cut into the bottom, on the side of the drain funnel.

The disadvantage of this catalytic cracking regenerator is the uneven input of coked catalyst, leading to the formation of stagnant zones, areas with uneven bulk density of the catalyst particles. All this leads to a decrease in the efficiency of burning the scythe and, as a result, a deterioration in the efficiency of regeneration.

Closest to the proposed utility model is the regenerator of the catalytic cracking [RF Patent №2106906, IPC B01J 8/26, publ. March 20, 1998], which includes a body with a coaxially mounted drain funnel and a coked catalyst inlet in the form of a pipe cut into the bottom of the body, on the side of the drain funnel, the inlet node is additionally equipped with a fairing in the form of a vertical partition located between the pipe and the drain funnel, with In this case, the upper edge of the baffle is located above the cut level of the branch pipe. The fairing baffle is additionally equipped with a bumper located above the branch pipe. The hot air inlet is located inside the housing.

The disadvantage of this catalytic cracking regenerator is the uneven input of coked catalyst, leading to the formation of stagnant zones, areas with uneven bulk density of the catalyst particles. All this leads to a decrease in the efficiency of burning the scythe and, as a result, a deterioration in the efficiency of regeneration.

The objective of this utility model is to create a catalytic cracking unit regenerator that allows efficient catalyst regeneration by ensuring a uniform distribution of coked catalyst particles, as a result of preventing the formation of stagnant zones.

The task is achieved by the fact that a regenerator of a catalytic cracking unit is proposed, including a body with a drain funnel, a hot air inlet device and a coked catalyst inlet, which is a branch pipe cut into the bottom of the body, equipped with a fairing in the form of a vertical partition and a baffle.

Distinctive features of the proposed utility model is that a cylindrical chamber is attached to the bottom of the fender, equipped with rectangular windows distributed over the side surface with the same angular pitch, and parallel plates are attached to the vertical edges of the windows from the outer sides, between which in the upper part, perpendicularly their side surfaces are placed flat partitions connected to each other.

In FIG. 1 shows a diagram of a catalytic cracking unit regenerator.

The regenerator of the catalytic cracking unit contains a body 1 with a drain funnel 2, a hot air inlet device 3 and a coked catalyst inlet unit, which is a branch pipe 4 cut into the bottom of the body 1, equipped with a fairing 5 in the form of a vertical partition and a baffle 6. To the bottom of the baffle 6, a cylindrical chamber 7 is attached, provided with rectangular windows 8 distributed over the side surface with the same angular pitch. Parallel plates 9 are attached to the vertical edges of the windows 8 from the outer sides, between which in the upper part, perpendicular to their side surfaces, there are flat partitions 10 connected to each other.

The catalytic cracking regenerator operates as follows.

Catalyst particles to be regenerated enter the internal volume of the housing 1 through the coked catalyst inlet and, being distributed, are transferred to a fluidized state. To burn the coke off the surfaces of the particles, the hot air input device 3 receives air heated to a temperature of more than 600°C.

When moving through the coked catalyst inlet, the particles first pass through the nozzle 4, interact with the fairing 5 and the bump 6 and are directed to the windows 8 in the cylindrical chamber 7. Passing through the windows 8, the particles move between parallel plates 9 attached to the vertical edges of the windows 8 from the outer sides. In order to prevent the movement of catalyst particles into the upper part of the housing and the disturbance of the fluidized bed between the plates 9 in the upper part, perpendicular to their side surfaces, flat baffles 10 are placed, connected to each other.

The regenerated catalyst particles are removed from the housing 1 through the drain funnel 2.

Due to the fact that windows 8 are made in the cylindrical chamber 7, distributed over the side surface with the same angular pitch, it is possible to ensure an almost uniform introduction of coked catalyst particles, prevent the formation of stagnant zones and form a stable uniform fluidized bed necessary for efficient regeneration.

Execution of windows 8 rectangular shape allows you to enter coked catalyst particles almost the entire height of the cylindrical chamber 7, which ensures a more uniform distribution.

Due to the fact that parallel plates 9 are attached to the vertical edges of the windows 8 from the outer sides, between which in the upper part, perpendicular to their side surfaces, flat partitions 10 are placed, connected to each other, directed flows of particles of the catalyst introduced for regeneration are formed, which, when interacting with the walls of the housing 1 and the air flows introduced from the hot air inlet device 3 are uniformly distributed and prevent the formation of stagnant zones.

The proposed design of the regenerator of the catalytic cracking unit makes it possible to effectively regenerate the catalyst by ensuring a uniform distribution of coked catalyst particles and preventing the formation of stagnant zones.

Claims (1)

Catalytic cracking unit regenerator, including a body with a drain funnel, a hot air inlet device and a coked catalyst inlet unit, which is a branch pipe cut into the bottom of the body, equipped with a fairing in the form of a vertical partition and a baffle, characterized in that a cylindrical chamber is attached to the bottom of the baffle , provided with rectangular windows distributed over the side surface with the same angular pitch, moreover, parallel plates are attached to the vertical edges of the windows from the outer sides, between which in the upper part, perpendicular to their side surfaces, there are flat partitions connected to each other.

Images